Yep, that's no cockroach but a longhorn beetle - looks like Phymatodes testaceus, which is a very variable species and is often found indoors having emerged from the log basket as the larvae develop beneath the bark.

I sent the same photos to a pest control company who sent me this reply;

"This is an insect called "cantharis livida" or more commonly the soldier beetle.

It was probably brought into the property through a packaged organic food item.

Our treatment consists of a fumigation and residual application in the kitchen and consists of 2 visits spaced 7 days apart.

Insect control £130 plus vat"

Your swift reply calmed me down, because you said "no"(!) But also because we have a wood burning stove so have reciently brought logs into our house. Had I not read your reply I would have thought the bug a danger to my larder ("organic food item") and commissioned a fumigation (Which i assume is not necessary).

Sorry not to thank you sooner, I usually use an iphone to access the internet and could ot workout how to post using it.

It is fantastic to have this information (I love the amazing illustrations in the last link). I have absolutely no knowledge of beetles & thus no idea what I'm looking for & am unable to tell the difference.The wealth of information given to me by this forum has been incredibly reassuring (as well as money saving!) It is good to know that my home is not infested by a pest, but merely visited by some displaced beetles (poor things I found more in the log sack -Bombuslucorum was spot on)

It is also concerning, but not surprising, to learn that the pest company are either incompetent or preying on fear.

Thank you all & I look forward to finding out more about the tiny visitors that share our home & garden.